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Roku TCL TV 65R635 / Denon AVR-X4400H No ATMOS

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    Roku TCL TV 65R635 / Denon AVR-X4400H No ATMOS

    I have a Roku TCL TV 65R635 connected to a Denon AVR-X4400H via eARC with 9.1 speakers (2 ceiling) and cannot get ATMOS, just DD+. I've tried various settings, etc. I have the latest updates on both. I've tried 3 or 4 different UHD movies that say ATMOS when I start playing them, but the AVR consistently shows DD+.

    The Roku TV settings for audio (I've tried passthrough and auto) show that the receiver is capable of ATMOS. Just trying to figure out where the problem is located has turned into a finger pointing game. Denon says they play/decode whatever they get. TCL says they send through whatever they get.

    More info...
    I'm trying to determine if there is an issue. The Denon AVR never shows ATMOS. Before last weekend I assumed it was because I did not have any speakers in my ceiling. However I finally got them installed and connected but the amp still only shows DD+. In reading the TCL and Roku forums I found many people with TCL TVs and Denon AVRs saying the same thing. I also found mention of a "Dolby Channel" that I didn't know about that has demo type "Show Off" clips for Dolby Vision and Dolby ATMOS. I loaded this and it's obvious that the ceiling speakers are playing content and to me it sounds like it's working.

    I started looking through the manual for the Denon AVR-X4400H and on page 306 it says this about "Dolby Atmos Stream" (which is what I assume I'm receiving vai channels like VUDU, Disney+, etc.: "Dolby Atmos content will be delivered to your Dolby Atmos Enabled AV receiver via Dolby Digital Plus or Dolby TrueHD on Blu-ray disc, downloadable files and streaming media..." So maybe that's the source of the whole issue - the receiver IS decoding Atmos but not actually showing so on the front panel display, it shows DD+. I've reached out to Denon to confirm this and to suggest that they give some indication that Atmos is working.

    I'll post more info as I get it.


      I’ve got a TCL 4K HDR Dolby Vision Roku TV hooked up to a 10 year old a Yamaha Atmos soundbar.

      However I had moved from a 1080P plasma and a Roku Ultra 4K and the performance of the Roku in the TV was lack luster. So I took the Roku Ultra and plugged it into the Roku TV and then eArc to the Yamaha soundbar.

      I know it seems silly and it’s extra money but the Ultra is so much better performance, even on 1080.

      Now is that why I have Atmos and you don’t. I can’t say. But the different inputs on the Roku TV support different standards and that could be something too.